I do silicone molds, and use an old milking machine pump that i got for $20 at a junk store . For a chamber I use a presure cooker pot with a 1/2" lexan lid that I made . The clear lid alows me to watch the rubber boil and expand . When the boiling mass colapses it is ready to pour . I also have a presure connector on the presure cooker lid that alows me to let the mold cure under pressure . Presure is usefull for casting clear acrylic with no bubles . |